Effects of Three Types of Textures on Wear Resistance and Mechanisms of Ultra-high Strength Steel Surfaces

• • The 3# dislocation-type regular hexagonal texture achieved a mass wear rate of 0.0823 mg/min, only 20.1% of the untextured substrate's 0.4084 mg/min, representing an 79.9% reduction in material loss. This directly extends component service life in defense and aerospace moving assemblies where AF1410 is specified. • • The 2# dislocation groove texture reduced wear rate to 42.8% of baseline (0.1748 mg/min), while the 1# simple groove texture achieved 82.7% (0.3377 mg/min). The non-linear dislocation arrangement outperforms linear grooves by a factor of 2.1 in wear reduction, validating stress dispersion and debris entrapment as primary functional mechanisms. • • All textured surfaces exhibited ploughing cutting and abrasive wear as dominant mechanisms, with minor adhesive wear; oxidative wear was absent across all specimens. The untextured substrate showed severe plastic cutting and deep ploughing, indicating that texture-induced contact stress redistribution suppresses severe material removal modes. • • Texture density varied: 1# groove at ~66.7%, 2# dislocation groove at ~59.6%, and 3# hexagonal at a lower effective density. Despite lower density, the 3# hexagonal pattern delivered superior wear resistance, proving that geometric arrangement and dislocation architecture, not density alone, govern tribological performance under dry sliding.